IDEC DATAVS1 Series - Manual (Page 52)

Instruction Manual SVS1 Series
47
• Parameters:
Min Position Expected
This allows you to specify the minimum value of the detectable position.
Max. Position Expected
This allows you to specify the maximum value of the detectable position.
• Sensitivity
This represents the sensitivity level, that is the level of edge detection precision. Set sensitivity
affects processing results; the lower the sensitivity, the greater the accuracy.
• Variation type
This establishes how the edge is to be detected during image acquisition. Possible values are:
From white to black: an edge feature is detected when it changes from white to black;
From black to white: an edge feature is detected when it changes from black to white;
Both: a feature is indicated as an edge feature when it changes from white to black and
black to white;
Automatic: the system automatically detects the edge feature.
• Noise reject
This is used to reduce noise during the edge detection process. It establishes the minimum
variation in brightness of a feature in order for it to be considered an edge.
• Direction
This determines the direction and edge detection path inside the ROI. This can be one of four
values:
From left to right (default value);
From right to left;
From top to bottom;
From bottom to top.
• Result
If the detected edge value is between the minimum and maximum values set by the user, the
control gives a positive result. If no edges are found, or their values are not within the thresholds,
the result will be negative.
• Example
Let's add a "position" control to the current inspection tool, so we can check that a cap is inserted
correctly on a detergent bottle.
Let's select "Position" from the Controls menu and then press the SET button.